        <li>
           <label for="feedback-email-address">验证码</label> <input type="text" size="30" name="vcaptcha" id="signup-mobile" class="i_text" require="true" datatype="require|limitc" min="4" max="4" style="text-transform:uppercase;"/><div class="i_tips"><em></em>请输入下面验证码上的字母或数字</div>
        </li>
        <li>

           <label></label> <img src="/captcha.php" title="看不清楚，点击更换" onclick="X.misc.captcha(this);" style="cursor:pointer;" />
        </li>